Last change
on this file since 466 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
658 bytes
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Line | |
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1 | |
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2 | /* @(#)z_ceil.c 1.0 98/08/13 */ |
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3 | /***************************************************************** |
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4 | * ceil |
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5 | * |
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6 | * Input: |
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7 | * x - floating point value |
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8 | * |
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9 | * Output: |
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10 | * Smallest integer greater than x. |
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11 | * |
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12 | * Description: |
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13 | * This routine returns the smallest integer greater than x. |
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14 | * |
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15 | *****************************************************************/ |
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16 | |
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17 | #include "fdlibm.h" |
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18 | #include "zmath.h" |
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19 | |
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20 | #ifndef _DOUBLE_IS_32BITS |
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21 | |
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22 | double |
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23 | ceil (double x) |
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24 | { |
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25 | double f, y; |
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26 | |
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27 | y = modf (x, &f); |
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28 | |
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29 | if (y == 0.0) |
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30 | return (x); |
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31 | else if (x > -1.0 && x < 1.0) |
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32 | return (x > 0 ? 1.0 : 0.0); |
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33 | else |
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34 | return (x > 0 ? f + 1.0 : f); |
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35 | } |
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36 | |
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37 | #endif /* _DOUBLE_IS_32BITS */ |
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